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Kling 2.6 is Kuaishou’s video generation model, available through AnyFast with the Kling Legacy API structure. It supports text-to-video, image-to-video, native audio, motion control, and reusable voices.

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Key capabilities

  • Text to video — Generate video from a prompt in 16:9, 9:16, or 1:1.
  • Image to video — Use a start frame, an end frame, or both, with motion brush and camera controls.
  • Native audio — Set sound to on to generate synchronized audio.
  • Specified voices — Reference up to two voices with <<<voice_1>>> and <<<voice_2>>> in the prompt.
  • Motion control — Transfer motion from a reference video to a character image.
  • Standard and professional modes — std produces 720p and pro produces 1080p.
Kling 2.6 supports fixed 5-second and 10-second durations. It does not support Kling 3.0 multi-shot generation, flexible 3–15 second duration, or 4K mode.

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Text to video

cURL

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Image to video

cURL
Images can be public URLs or raw Base64 strings without a data:image/...;base64, prefix. Use JPG, JPEG, or PNG files no larger than 10 MB, with each side at least 300 px and an aspect ratio from 1:2.5 through 2.5:1.

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Motion control

Motion control combines a character image with a motion reference video. Reference videos must be MP4 or MOV, no larger than 100 MB, and at least 3 seconds long. The maximum is 10 seconds when character_orientation is image and 30 seconds when it is video.
For difficult or fast motion, the model may extract only the usable continuous segment and return a result shorter than the uploaded video. A task can still run when at least 3 seconds of continuous usable motion is found, and the consumed credits are not refunded. Reduce the motion difficulty or speed when needed.

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Voice management

Create a reusable custom voice from a public MP3, WAV, MP4, or MOV URL, or from an eligible previously generated video. The source should contain one clear speaker and be 5–30 seconds long. Use the returned voice_id in a video’s voice_list.

Kling 2.6 API reference

View the complete Legacy API parameters for text to video, image to video, motion control, and voice management.